Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

The time range options that you see will differ if you have enabled Centralized Reporting. For details, 
see information about Centralized Reporting Mode in 

 

The top senders which have connected to public listeners of the appliance are listed in the External 
Domains Received listing table at the bottom of the Incoming Mail page, based on the view selected. 
Click the column headings to sort the data. See 

 for an explanation of the 

various categories.

The system acquires and verifies the validity of the remote host’s IP address (that is, the domain) by 
performing a double DNS lookup. For more information about double DNS lookups and sender 
verification, see 

The Sender Detail listing has two views, Summary and All.

The default Sender Detail view shows the total number of attempted messages for each sender, and 
includes a breakdown by category (the same categories as the Incoming Mail Summary graph on the 
Overview page.

The value for Stopped by Reputation Filtering is calculated based on several factors:

- Number of “throttled” messages from this sender.

- Number of rejected or TCP refused connections (may be a partial count).

- A conservative multiplier for the number of messages per connection. 

When the appliance is under heavy load, an exact count of rejected connections is not maintained on a 
per-sender basis. Instead, rejected connections counts are maintained only for the most significant 
senders in each time interval. In this situation, the value shown can be interpreted as a “floor”; in other 
words, at least this many messages were stopped. 

The Stopped by Reputation Filtering total on the Overview page is always based on a complete count of 
all rejected connections. Only the per-sender connection counts are ever limited due to load.

Additional columns that you can display are: 

Connections Rejected: All connections blocked by HAT policies. When the appliance is under heavy 
load, an exact count of rejected connections is not maintained on a per-sender basis. Instead, rejected 
connections counts are maintained only for the most significant senders in each time interval.

Connections Accepted: All connections accepted

00:00 of the first day of the month to 23:59 of the last 
day of the month

the range enclosed by the start date and hour and the 
end date and hour that you specify